You can now have intervals that are right next to each other with no recovery interval in between. You can also split(S), merge(M) or delete(D) the interval at the marker position using keyboard keys or by clicking the button. Merging an interval merges it with the work interval on the right hand side.
Split with S to make 3 intervals:
Delete middle one with D:
Merge on left interval with M to put everything back as it was: